David,
see my comments interspersed below.
Brad Velander,
Lead PCB Designer,
Norsat International Inc.,
#300 - 4401 Still Creek Dr.,
Burnaby, B.C., V5C 6G9.
Tel. (604) 292-9089 direct
Fax (604) 292-9010
website www.norsat.com
> -----Original Message-----
> From: David Cary [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, April 25, 2001 8:54 AM
> To: [EMAIL PROTECTED]
> Subject: [PEDA] schematic library tips
>
> Dear Protel users,
>
> I'm trying to use a 176 pin component. Is there a way to list
> all the pins and
> whether each one is input, output, etc. ? It's a real drag
> double-clicking each
> one, comparing its "electrical type" to my data sheets.
Was already mentioned, use the report facility within the library
editor.
>
> It's obvious on symbols with a common geometric
> representation (NOR gates,
> inverters).
> On larger chips, the pins marked with the little triangle
> "CLK symbol" are
> obviously inputs,
> but what about the other (non-clock) inputs and outputs ?
There is no standard per se, somebody probably has some methodology
but it is probably in conflict with other standards.
> symbols, a "power" part and 4 identical "function" parts. One
> must remember to
> place *all* the parts of a real component somewhere on the schematic.
I don't quite understand your comment here, there is no absolute
requirement to place all parts. It is much cleaner in a number of ways which
include, all parts are on the sheet, all inputs/outputs can be properly
terminated.
> Is there a standard way to indicate (on paper) which pins are
> input and which
> pins are output on a (b)-flavored schematic symbol ?
No.
>
> Does anyone actually use the "Hi-Z" pin type ?
I use all the proper pin types. It does generate a fair number of
error/warning reports but then that just makes me double check everything to
assure the design is as intended.
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